International Health
Volume 8 Issue 2 February 2016
http://inthealth.oxfordjournals.org/content/current

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Spillover effect of HIV-specific foreign aid on immunization services in Nigeria
Charles C. Chima and Luisa Franzini
Abstract
Background Health aid to Nigeria increased tremendously in the last decade and a significant portion of the funds were earmarked for HIV-associated programs. Studies on the impact of HIV-specific aid on the delivery of non-HIV health services in sub-Saharan Africa have yielded mixed results. This study assessed if there is a spillover effect of HIV-specific aid on childhood vaccinations in Nigeria.
Methods Multivariate logistic regression models were used to estimate the effect of aid disbursements in a previous year on the receipt of vaccines at the individual level in a given year. Estimations were done for approximately 11 700 children using data from demographic and health surveys conducted in Nigeria in 2003 and 2008.
Results US$1 increase in HIV aid per capita was associated with a decrease in the probability of receipt of vaccines by 8–31%: polio first dose decreased by 8%; polio final dose by 9%; diphtheria-pertussis-tetanus (DPT) first dose by 11%; DPT final dose by 19%; measles by 31%; final doses of polio and DPT plus measles vaccine by 8%.
Conclusions HIV-specific aid had a negative spillover effect on immunization services in Nigeria over the study period. Donors may need to rethink their funding strategies in favour of more horizontal approaches.